[51.15] Measurements of Time Variable Anisotropy in the Interstellar Medium

K. Desai (NRAO/NRL), A. Fey (USNO)

We have observed several extragalactic sources known to be
affected by interstellar scattering in the Cygnus region.
We show that the scattering is anisotropic, and that the
anisotropy is time-variable and frequency independent.
These observations add to the growing number of measurements
suggesting that a significant component of interstellar
scattering is anisotropic. We also present a simple
analysis of the properties of the magnetic fields in the
Cygnus region.

The author(s) of this abstract have provided an email address for comments about the abstract: kdesai@nrao.edu